9. PTFE GASKETS · 2006. 9. 26. · compounded products with good mechanical properties, electrical...

PROPERTIES AND APPLICATIONPTFE gaskets are one of the most suitable types of gaskets for a variety ofsealing applications and are mostly based on virgin PTFE or filled PTFE.And what provides the PTFE gaskets with such an extensive range ofapplicability? The answer is PTFE. PTFE is a fluoropolymer, whichfeatures an outstanding chemical resistivity to almost all chemicals,good thermal insulation properties, and useful mechanical andprocessing characteristics. The above-mentioned PTFE features can beusefully applied in PTFE gaskets. They can be mostly used in valve seats,bearings, requested to resin sliding and chemicals, elastic band for un-lubricated compressors, O-rings where elastomers can not withstand.An extended range of improved mechanical and processing propertiescan be additionally reached by combination of virgin PTFE and differentfillers. Different combination offer a variety of different propertiesdescribed in the following table.

Filler Improved properties

Glass � enhanced wear resistance� chemical resistance

Graphite� extremely low coefficient of friction� fairly good compressive strength� good wear resistance

Carbon � good thermal resistance� resistance to deformation

Bronze� enhanced compressive strength� good wear resistance� high thermal conductivity

Expanded PTFE Gaskets and Seal materials consist of virginal PTFE withmultidirectional fibrous and/or porous structure, which the extrudedPTFE consists of. A special manufacturing process provides the materialwith special chemical and physical properties. This can be of advantagein wide range of the applications.

ADVANTAGES

SHAPE AND CONSTRUCTION

SIZE

Virgin PTFE, PTFE compounds and expanded PTFE offer a wide range ofcompounded products with good mechanical properties, electricalproperties, thermal properties, chemical resistance, low frictioncoeficient and good resistance to wear.

Several types of TESNILA TIT PTFE gaskets are produced to meet themost demanding application.

Tesnila TIT is using virgin PTFE powder and compounds for RAMextrusion and compression moulding delivered exclusively byrecognised supplier (DUPONT, HOECHST-DAYNEON)

SIZE limitations: each peace can feature a maximum external diameterof up to 1000 mm.

Materials

STANDARDS FOR PTFE GASKETS USED WITH FLANGES

Gasket Standard Flange StandardEN 1514-1 (former DIN 2690, DIN 2692, DIN 2693) PrEn 1092-1,-2,-3 ,-4 ,

EN 545, EN 598, EN 969

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9. PTFE GASKETS

GASKET ORDERING EXAMPLEEN 1514-1 (former DIN 2690), DN 65, PN 16, Form IBCvirgin PTFE , 2 mm,

T10

T14

T16